Ice-cream freezer



2 Sheets-Sheet 2 A. O. WINN & G. L. WINSHIP.

Ice-Cream Freezer.

Patented Mar. 16,1880.

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UNITED STATES PATENT OFFICE,

AMMI O. WINN AND GUSTAVUS L. WINSHIP, OF BOSTON, MASSACHUSETTS.

ICE-CREAM FREEZER.

SPECIFICATION forming part of Letters Patent No. 225,676, dated March 16, 1880.

Application filed July 12, 1879.

To all whom it may concern:

Be it known that we, AMMI O. WINN and GUSTAVUS L. WINsHIP, both of Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Ice- Oream Freezers, of which the following is a specification.

The drawings accompanying this specification represent, in Figure 1, a front elevation, in Fig. 2 a side elevation, and Fig. 3 a vertical and central section, while Fig. 4 is a horizontal section, of a machine embracing our invention, said Fig. 4 being taken through the coupling-sleeve, to be hereinafter explained.

Our invention relates to ice-cream freezers in which the can or vessel containing the eream,vand the beater within the same, have independently rotary movement; and it con sists in the combination and arrangement of certain herein after-specified instru mentalities, whereby either the can or the beater may revolve while the other is at rest, or both may revolve together.

In the above-named drawings the frame of the machine is shown as composed of a rectangular open structure embracing four upright corner-posts, A A A A, &c., erected upon a suitable base, B, and tied at top by a plate or cross-brace, 0, while to the front of the front posts and to the rear of the rear posts, and at the upper part of both, we secure open frames D or D, such frames constituting the supports of two sets of pulleys, to be hereinafter explained.

The tub for containing the broken ice and salt is shown at E as deposited upon the base B, and between the front posts A A, and suitable guides are to be added to the base to insure the proper position of the tub with respect to the driving shaft, such tub being adapted to slide in and out with respect to such shaft.

The can for containing the cream is shown at F as deposited within the tub and stepped at the bottom in the latter, in order to rotate therein after the manner of ice-cream freezers in general.

G in the drawings represents a vertical shaft, the upper end of which is journaled within a box, H, making part of the frame D before mentioned, the lower end of said shaft G finding a support and bearing within a tubular shaft or hub, I, which encompasses the said lower end of the shaft G, and is in turn supported within a box, J, making part of the said frame D, the upper end of the can-shaft I bearing a pulley, K, about which and a driving-drum, L, an endless band, M, passes, and by which the pulley K derives motion, the said drum L being carried by a vertical shaft,

N, journaled within the frame D, and driven by power suitably applied or by a hand-crank, as the case may be.

The inner shaft, G, which we term the beater-shaft, since it drives the beater, also carries a pulley, which is shown at O as of like size with the pulley K, and arranged above the latter and adapted to operate with the band M, while a third and like-sized pulley, P, loosely encompasses the shaft Gr above the pulley O, and is a loose pulley, so called.

A shipper-bar to shift the band M from one to the other of the three pulleys above named, as occasion may require, is shown at Q, as a long bar disposed alongside of the band M, and pivoted at its rear end to the inside of one of the rear posts, D, of the machineframe, the front end or handle, I), of such bar protruding beyond the front of the post D of said frame into a convenient position to be seized by the attendant, fork c of the bar Q, straddling the band, as shown in the drawings.

To hold the shipper-bar rigidly in proper position, we pass a pin through one of three holes, d cf, bored in the frame, and into a hole, g, in the shipper-bar, the holes at e f being arranged opposite the pulleys K, O, and I, respectively.

To arrest the motion of the can and permit the beater or dasher to revolve independently of it when occasion requires, we employ a brake, which consists of an upright bar, R, suspended at its upper end by a pivot, h, from a cross-bar, i, spanning the upper ends of the posts A A, the lower end of said bar R being connected to a horizontal bar, S, which is disposed below the pulleys, and is pivoted at one end to one of the posts A, the opposite end of such bar S being connected to the rear end of a link, j, which is swiveled to the outside of the opposite post A in such manner as to slide upon it horizontally, while to the front end of such link j we pivot an eccentric, k, which wipes against the front face of the adjacent post A, and is provided with a handle, Z, for convenience of operation.

A shoe, m, is applied to the bar S to operate upon the perimeter of the pulley, and when it is desired to arrest the rotation of said pulley and of the tubular can-shaft I, which rotates the can, the handle I of the eccentric is lowered and the bar'S and shoe m forced toward the pulley and the shoe brought against its perimeter. Upon raising the handle l the shoe recedes from the pulley, and the latter is free to revolve when the band is upon it.

To arrest the motion of the beater-shaft G, we employ a second brake, which is a counterpart of the first, its vertical bar being shown at 02, its horizontal bar at 0, its link at p, and its-eccentric at 1'.

' In lieu of the last-named brake mechanism to estop the rotation of the beater-shaft, we may employ a ratchet-wheel, s, fixed to the upper end of the said shaft, and operating with a dog, it, pivoted to the adjacent part of the machine-frame; but we prefer the brake mechanism before explained.

To provide a means of connection between the beater-shaft G and the hub or spindle u of the beater, we form upon the adjacent ends of each a rectangular shoulder, v, and we employ a short sleeve or collet, 00, having a rectangular bore,y, ofa size and shape corresponding to the said shoulders, the sleeve serving to inclose the latter and compel the beater to rotate by and with the shaft G, and yet perunit the two to be separated and the can and its tub readily removed.

A suitable clutch is employed to connect the can with the tubular can-shaft or huh I, such clutch, in the present instance, being composed of one or more spurs, z, erected upon the top of the cover a of the can, and operating with notches 1), formed in the lower part of the said can-shaft I. This clutch permits of ready removal of the can and tub and the equally ready connection of the can with its driving-shaft.

In operating with this machine the tub is packed with ice, the can filled with cream, the dasher put in place, and the tub pushed up to its position beneath the lowermost pulley, the coupling sleeve being first passed up about the lower part or shoulder, 12, of the beatershaft G, to permit the can to be placed in po sition below such shaft, the lower part of the box of the canshaft I being enlarged to receive the sleeve, as shown in Fig. 3 of the drawings. In pushing the can up to place the spurs z are readily inserted in the notches I), thus connecting the can with its shaft I, and the sleeve is then allowed to drop, thereby connecting the said can-shaft I with the spindle of the beater. The drum L is now put in rotation and the belt shipped onto the central pulley, 0, thereby putting the beatershaft G and heater in rotation and agitating the cream within the can, it being observed that the two brake mechanisms are inactive or idle. As the cream begins to thicken by the'reduced temperature within the can the friction between the can and heater becomes so great that the can begins to revolve, and to prevent this the brakemechanism is applied to the pulley of the canshaft to hold the can immovable, while the beater continues to revolve. 'After a time the brake mechanism is removed from the canshaft and the fellow brake applied to the pulley of the beater-shaft, and at the same time the belt is shipped from the pulley of the beater-shaft to that of the can-shaft, and the can allowed to rotate while the beater is stationary. At other times the two brakes may be removed from the pulleys and the can and beater rotate together.

We have found in practice that beneficial results follow the changing from one movement to another-that is, allowing the can to rotate while the beater is stationary, and vice versa, and at other times permitting the two to rotate together; hence in freezing cream with this machine we frequently change from one to the other.

We may mention that a second method or combination of pulleys may be arranged to give the same resultant motions--namely, a pulley whose cross secti0n vertically at both ends is a frustum of a cone in shape is placed loosely on the beatershaft. On this pulley runs the belt, and above this pulley is placed and splined to the shaft the beater pulley, whose cross section is a hollow frustum of a cone, into which the loose pulley fits. On the loose pulley is arranged a shipperbar, pivoted at the middle to the loose pulley and made fast at one end, while the other is fitted with a handle for the attendant. By slightly moving this bar the driving-belt and the loose pulley are pressed along the shaft, and the loose pulley fitting closely into the hollow part of the beater-pulley, as above described, causes friction and a consequent movement on the part of the beater-pulley and connecting-shaft, the belt still continuing to move on the loose pulley. Below this loose pulley is the can-pulley, made fast to the can-shaft, and in cross-section the same as the beater-pulley above described, and fitting over the loose pulley. As in the case of the beater-pulley, by reversing the movement of the shipper-bar friction occurs between the loose pulley and the canpulley, which revolves in its turn. The same two brakes, and for the purposes before described, are used in connection with the heater and can pulleys.

When the cream has reached the desired consistency, or become frozen, the sleeve is raised from above the shoulder of the spindle 0f the heater, and this permits the tub to be removed.

We claim- The combination of the can, the divided 5 beater-shaft, the concentric can-shaft, the driving-pulleys for said shafts, the belt, the belt-shipper, and the brakes-one for each shaft-these parts being constructed and arranged for joint operation as set forth.

AMMI G. WINN. G. L. WIN SHIP. Witnesses:

H. E. LODGE, F. CURTIS. 

